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- # include <stdlib.h>
- # include <stdio.h>
- void main()
- {
- int month;
- int day;
- printf("please input the month number: ");
- scanf("%d", &month);
- switch (month)
- {
- case 1:
- case 3:
- case 5:
- case 7:
- case 8:
- case 10:
- case 12: day=31;
- break;
- case 4:
- case 6:
- case 9:
- case 11: day=30;
- break;
- case 2: day=28;
- break;
- default: exit(0);
- }
- printf("1999.%d has %d days.n", month, day);
- }